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Title: M3: a new muon missing momentum experiment to probe (g – 2)μ and dark matter at Fermilab

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [2];  [2]
  1. Princeton Univ., Princeton, NJ (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
+ Show Author Affiliations

Here, new light, weakly-coupled particles are commonly invoked to address the persistent $$\sim 4\sigma$$ anomaly in $$(g-2)_\mu$$ and serve as mediators between dark and visible matter. If such particles couple predominantly to heavier generations and decay invisibly, much of their best-motivated parameter space is inaccessible with existing experimental techniques. In this paper, we present a new fixed-target, missing-momentum search strategy to probe invisibly decaying particles that couple preferentially to muons. In our setup, a relativistic muon beam impinges on a thick active target. The signal consists of events in which a muon loses a large fraction of its incident momentum inside the target without initiating any detectable electromagnetic or hadronic activity in downstream veto systems. We propose a two-phase experiment, M$^3$ (Muon Missing Momentum), based at Fermilab. Phase 1 with $$\sim 10^{10}$$ muons on target can test the remaining parameter space for which light invisibly-decaying particles can resolve the $$(g-2)_\mu$$ anomaly, while Phase 2 with $$\sim 10^{13}$$ muons on target can test much of the predictive parameter space over which sub-GeV dark matter achieves freeze-out via muon-philic forces, including gauged $$U(1)_{L_\mu - L_\tau}$$.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1439466
Report Number(s):
arXiv:1804.03144; FERMILAB-PUB-18-087-A; 1667037; TRN: US1900618
Journal Information:
Journal of High Energy Physics (Online), Vol. 2018, Issue 9; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 66 works
Citation information provided by
Web of Science

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Cited By (11)

Light dark matter in a gauged U ( 1 ) L μ − L τ model journal February 2019
Physics beyond colliders at CERN: beyond the Standard Model working group report journal December 2019
Dark matter, millicharges, axion and scalar particles, gauge bosons, and other new physics with LDMX journal April 2019
Probing light dark matter with a hadrophilic scalar mediator journal November 2019
Search for muon-philic new light gauge boson at Belle II journal October 2019
Physics beyond colliders at CERN: beyond the Standard Model working group report text January 2020
Search for muon-philic new light gauge boson at Belle II text January 2020
Discovering true muonium at LHCb journal September 2019
Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report text January 2019
Neutrino Tridents at DUNE text January 2019
Dark matter interactions with muons in neutron stars text January 2019

Figures / Tables (12)

Figure 1(p. 4)figure Figure 1
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Figure 3(p. 9)figure Figure 3
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Figure 7(p. 15)figure Figure 7
Figure 8(p. 17)figure Figure 8
Figure 9(p. 20)figure Figure 9
Figure 10(p. 21)figure Figure 10
Figure 12(p. 26)figure Figure 12
Figure 13(p. 27)figure Figure 13

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Fixed target experiments